linux-kernel - Re: [PATCH v2] selftests/ftrace: Use printf instead of echo in kprobe syntax error tests

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Date:   Fri, 29 May 2020 15:26:06 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Seth Forshee <seth.forshee@...onical.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>, Shuah Khan <shuah@...nel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] selftests/ftrace: Use printf instead of echo in kprobe
 syntax error tests

On 5/29/20 2:37 PM, Seth Forshee wrote:
> On Wed, Mar 04, 2020 at 04:20:09PM -0600, Seth Forshee wrote:
>> Test cases which use echo to write strings containing backslashes
>> fail with some shells, as echo's treatment of backslashes in
>> strings varies between shell implementations. Use printf instead,
>> as it should behave consistently across different shells. This
>> requires adjustments to the strings to escape \ and % characters.
>> ftrace_errlog_check() must also re-escape these characters after
>> processing them to remove ^ characters.
>>
>> Signed-off-by: Seth Forshee <seth.forshee@...onical.com>
> 
> Ping. Someone just asked me about this patch, and I noticed that it
> hasn't been applied or received any feedback.
> 

I pulled in this patch from Masami:

selftests/ftrace: Use printf for backslash included command
https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git/commit/?h=next&id=8e923a2168afd221ea26e3d9716f21e9578b5c4d

Looks like a duplicate.

Seth,
Is your patch still needed?

+ Steve and Masami

thanks,
-- Shuah